In their place, Chinese developers have created similar platforms. Sina Weibo, for example, takes the place of Twitter as the country's primary microblogging site.

But that hasn't stopped American tech giants from eying a piece of China's massive market.

"We have long said that we are interested in China, and are spending time understanding and learning more about the country in different ways. Our focus right now is on helping Chinese businesses and developers expand to new markets outside China by using our ad platform," Facebook said in a statement Saturday.